Annual Progress Report for Planning Coordination
NV Energy 2010 Annual Progress Report
In accordance with WECC Progress Report Policies and Procedures, the following is NV Energy’s
2010 Annual Progress Report1.
NV Energy North
Ely Energy Center (EEC)
Install two new generation facilities with-in service dates of June 2015 for EEC Unit #1 and June 2016
for EEC Unit #2: Postponed indefinitely
“One Nevada” Transmission Line Project (ON Line).
Install 500-kV 236 mile long line from the proposed Robinson Summit Substation located 20 miles west
of Ely, Nevada to the existing Harry Allen Substation located northeast of Las Vegas, Nevada. Fold
existing Falcon – Gonder 345 kV line into Robinson Summit Substation and connect 345 kV and 500
kV buses through 2×525 MVA 345/500 kV autotransformers. Install 70% series compensation
equipment on Falcon – Robinson 345 kV line, 35 % at each end. NVE is currently performing SubSynchronous Resonance (SSR) studies to identify possible adverse effects on the near-by generators.2.
As designated in the Transmission Use and Capacity Exchange Agreement (TUA) signed on 8/20/2010
between NVE and Great Basin Transmission, LLC (GBT), the ON Line will be a jointly owned project
by the parties. The proposed in-service date is Q4, 2012.
“Southwest Intertie” Project (SWIP).
This project is considered as Phase II to ON Line Project. Install 500-kV 275 mile long Line from Idaho
Power’s Midpoint to the proposed Robinson Summit Substation located 20 miles west of Ely, Nevada.
Install 70% series compensation (for 245 mile line impedance) equipment on this line as follows: 35%
at Thousand Springs located 126 miles from Midpoint and 35% at Robinson. Install 2×600 MVA
345/345 kV Phase Shifting Transformers (PST) at Robinson Summit: one on Falcon and another – on
Gonder 345 kV line terminals respectively. Install 70% series compensation on Robinson – Harry Allen
500 kV line, 35 % at each end. NVE and LS Power are in a process of coordinating SSR studies to
identify possible adverse effects on the near-by generators. As designated in the Transmission Use and
Capacity Exchange Agreement (TUA) signed on 8/20/2010 between NVE and Great Basin
Transmission, LLC (GBT), SWIP will be a jointly owned project by the parties. The proposed inservice date is Q4 2012.
“Southern Nevada Intertie” Project (SNIP).
This project is considered as Phase II to ON Line Project. Install 500-kV 60 mile long line from NVE’s
Harry Allen Substation to Southern California Edison’s Eldorado Substation. Install 70% series
compensation at Harry Allen. NVE and GBT are in a process of performing SSR studies to identify
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Also attached to this progress reports is Great Basin Trans - SWIP WECC 2011 Annual Supplemental Progress Report.pdf.
this supplemental report provides details of the progress made during 2010 on the SWIP path rating studies made by Great
Basin Transmission LLC.
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Any generators that expect adverse SSR effects from these installations are responsible, according to the WECC
Guidelines, for studying and addressing (mitigating) these effects ,
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possible adverse effects on the near-by generators. As designated in the Transmission Use and Capacity
Exchange Agreement (TUA) signed on 8/20/2010 between NVE and Great Basin Transmission, LLC
(GBT), the ON Line will be a jointly owned project by the parties. The proposed in-service date is Q4,
2013.
Blackhawk 345/120 kV substation (was Emma):
This a new substation with a projected in service date of June, 2018. This project is postponed
indefinitely.
Fallon 230 kV Source
Install a new 230 kV line From Pony Express Sw Sta (Enel) to a new 230/60 kV substation
(approximately 1/2 mile South of Fallon) and build a series of substations and switching stations (Pony
Express, Bunejug, and Macari) to provide new source, via a 25 mile 230 kV line, to the City of Fallon.
The projected in service date for this project is June 2014.
Bannock Substation and Jersey Valley Geothermal
In 2010 NV Energy completed construction of the new 120 kV Bannock Substation. This substation
connects to the existing #152 120kV line and the Phoenix Mill 120kV line. A new radial line, the Jersey
120kV line, interconnects with the Jersey Valley generating plant. Ormat LLC constructed a 3397.5ACSR 120kV pole line, transformed from 120 to 13.8-kV to the geothermal generating plant
consisting of two 22.5 MVA generating units in Jersey Valley approximately 28 Miles southwest
of the Bannock Substation.
NV Energy South
McDonald 230/138 kV Additions
NV Energy plans to add a new 336MVA 230/138kV transformer is being installed at the existing
McDonald substation. The existing Arden-Decatur 230kV line will be folded into the new McDonald
substation. In service date of June 1, 2014 is projected for this project.
Harry Allen Combined Cycle and 500 kV Generator Lead Line
The project is to interconnect a new 500 MW Combine-Cycle generator to Harry Allen 500 kV
switchyard and construct a triple bundled 1590-ACSR circuit on single circuit structures from Harry
Allen 500-kV switch yard to the new Harry Allen Combined Cycle Generating Plant. NVE is currently
performing Sub-Synchronous Resonance (SSR) assessment to identify possible adverse effects and
required mitigations for this generating facility. In service date of June 1, 2011 is projected for this
project.
Northwest 500/230 #2 Transformer Addition
Install three, 500/230 kV, single phase autotransformers with a rating of 300/400/500 MVA at the
existing Northwest substation. In service date of June 1, 2018 is projected for this project.
Equestrian 500/230 kV Substation
The Equestrian project is needed to deliver bulk power to Las Vegas off the Harry Allen to Mead 500
kV line and consists of the following: Equestrian North 500/230 kV substation and Equestrian –
Faulkner 230 kV line #2. The necessity of this project has been supplanted by better alternatives and this
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project has been cancelled.
Brooks 230/138/12 kV Substation and Pecos-Brook 230 kV Line
The addition of a new 230 kV transmission line between Pecos and the future Brooks substation site
along with folding in the 138 kV sub-transmission between Leavitt and Gilmore substations into the
Brooks substation will eliminate N-1 low voltage issues. In service 2017
Sunrise 500/230 Substation
To increase import capability into the NEVP system, the Sunrise Project taps the Harry Allen-Mead 500
kV transmission line with two 1500 MVA 500/230 kV transformers and Integrates the Sunrise 230 kV
facility with existing 230 kV Nevada Power Company facilities. In service 2018.
Sunrise 500/230 # 2 transformer Addition
This is a second 500/230 transformer addition at Sunrise, will fold in the existing Harry Allen - Mead
500 kV #1 line. In service date of June 1, 2020 is projected for this project
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